Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Ear protector with a sound damping filter, sound damping filter for such an ear protector as well as method for manufacturing a sound damping filter for such an ear protector

a technology of ear protection and filter, which is applied in the field of ear protection with a sound filter, can solve the problems of low surface energy, inconvenient manufacturing, and inability to prevent water from entering the ear canal through the perforated membrane,

Active Publication Date: 2013-05-23
DYNAMIC EAR
View PDF26 Cites 11 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

The patent text describes an ear protector that uses a special membrane made of a non-porous material that allows water vapor to pass through while preventing water from entering. This membrane is made of thermoplastic polyurethane, which has good permeability but is also highly tacky. The use of this membrane ensures that the ear protector has the necessary sound-damping characteristics, regardless of the desired acoustical transfer function. The technical effect is improved protection against water and moisture for the ear without compromising the sound-damping performance of the ear protector.

Problems solved by technology

However, this known ear protector with its perforated membrane cannot prevent penetration of water in the ear canal and is not suitable for example for people with openings in the eardrum.
The microscopic pores of this known ear protector that let air and water vapour pass through, yet have such low surface energy that the surface tension of any (liquid) water in contact remains too high to allow it to squeeze through the pores.
Microporous membranes have traditionally been let down by the contamination of their pores which significantly degrades the moisture transfer through the membrane and commonly also have poorer adhesion to fabrics making them more susceptible to de-lamination.

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Ear protector with a sound damping filter, sound damping filter for such an ear protector as well as method for manufacturing a sound damping filter for such an ear protector
  • Ear protector with a sound damping filter, sound damping filter for such an ear protector as well as method for manufacturing a sound damping filter for such an ear protector
  • Ear protector with a sound damping filter, sound damping filter for such an ear protector as well as method for manufacturing a sound damping filter for such an ear protector

Examples

Experimental program
Comparison scheme
Effect test

second embodiment

[0022]In FIG. 2 is shown the ear protector 1, comprising a universal earpiece 10 that is sealed to the ear by means of three flanges 11a, 11b and 11c. In the ear protector a sound damping filter 12 is mounted, comprising a sound channel 13, which also is a filter housing for a membrane 14, mounted on a membrane support 15. The membrane 14 is composed of a non-porous material with same composition and same “breatheability” characteristics as the membrane 5 in FIG. 1.

third embodiment

[0023]FIG. 3 shows in the ear protector 1 a sound damping filter 16 with a filter housing 17 comprising a membrane 18, mounted on a membrane support 19. The membrane 18 is composed of a non-porous material with same composition and same “breatheability” characteristics as the membrane 5 in FIG. 1. This filter housing 17 has same dimensions and characteristics as the filter housing 4 and is mounted in the custom earpiece 2. The support 19 carries membrane deflection limiters 20, located at both sides of the membrane 18, each comprising an impulse blocker mesh. This support 19 has standardized dimensions and is mounted in the sound channel 7 of the ear protector, connecting the inside 8 and outside 9 of the of the ear protector. These impulse blocker mesh are limiting the deflections of the membrane due to overpressure and under-pressure in the sound channel. This limitation of the deflection stops a pressure wave in the sound channel 7 on an effective way.

[0024]In an alternative of t...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
Fractionaaaaaaaaaa
Fractionaaaaaaaaaa
Strengthaaaaaaaaaa
Login to View More

Abstract

An ear protector (1) with a sound damping filter (3), comprises a membrane (5). The membrane is composed of a material that permits the transmission of air and water vapour with respect to the ear from the into the outside of the ear protector, the membrane is pre stressed mounted in the filter, enabling a bigger surface and hence bigger air and water transport at same sound attenuation.

Description

FIELD OF INVENTION[0001]The invention relates to ear protectors with a sound filter.DESCRIPTION OF PRIOR ART[0002]The invention relates to an ear protector with a sound damping filter, comprising a membrane composed of a material for permitting the transmission of air with respect to the ear from the outside to the inside of the ear protector.[0003]Such an ear protector with sound damping filter is disclosed in EP 1 046 382 A1 and provides with its perforated membrane a ventilation of the ear canal. Ventilation of the ear canal is important for the drain of perspiration and the reduction of inflammations. The sound damping characteristics of the sound damping filter in this known ear protector depend on the kind of material of the membrane, its dimensions and the number and dimensions of the perforations. However, this known ear protector with its perforated membrane cannot prevent penetration of water in the ear canal and is not suitable for example for people with openings in the ...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
IPC IPC(8): A61F11/00
CPCA61F11/08A61F11/008A61F2011/085A61F11/085A61F11/30
Inventor WILMINK, ENGBERT
Owner DYNAMIC EAR
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com